Citizen CMP-10 Compatible Battery BA-10-02 7.4V 2200mAh

Citizen CMP-10 / CMP-10BT — 7.4V Li-ion Replacement Battery (BA-10-02)

This is a 7.4V, 2200mAh Li-ion replacement battery for the Citizen CMP-10 and CMP-10BT mobile thermal printers. It replaces OEM part BA-10-02 and slots directly into the printer's battery compartment. These printers are used in retail, logistics, and field service where print jobs happen away from a power outlet.

• CMP-10 and CMP-10BT compatibility: Both models run the same 7.4V battery rail and use an identical battery bay and connector. The BMS handshake is shared across the CMP-10 platform, so one cell covers both variants without firmware or hardware differences.
• Bench tested on actual hardware: We ran this battery through charge cycles on a CMP-10 unit and monitored BMS response during print jobs. The cell held a stable voltage under thermal head and paper feed motor load, and the BMS did not trip on motor-start current draw.
• Post-install print sequence: After fitting this battery, charge it fully and run five test receipts before putting the printer into service. The paper feed motor needs that print sequence to let the BMS establish a current profile for the new cell — skipping it can cause feed hesitation on the first live job.

Voltage sag under thermal head load on the CMP-10

The CMP-10's thermal print head draws a short burst of current each time it fires a row of dots. On a degraded or deeply discharged battery, this burst causes a voltage sag that the printer interprets as a low-battery shutdown condition. A new cell with healthy internal resistance holds voltage steady through that burst. If the printer cuts out mid-receipt on a charged battery, check that the cell voltage at rest is at or above 7.2V before loading a job.

Faded or uneven print density on a freshly charged battery

The thermal head requires a consistent supply voltage to reach the correct temperature across its full dot width. If voltage fluctuates even slightly during a print line, some dots fire cooler than others — the result is streaky or faded output that looks like a paper or head fault but isn't. This often appears on batteries with high cycle counts, where internal resistance has risen enough to cause mid-line sag. Replacing the cell and running the five-receipt calibration sequence typically resolves this without any head cleaning or paper adjustment.